global template variables

[Soni Bergraj]

Hello,
I'm new to web.py and just wonder if there is a convenient way to deal
with global template variables. My current approach is like that:

class some_url_handler:
def GET(self):
from globals import *
some_template_specific_variable = "some value"
...

web.render('some.tmpl')

The drawback is that i have to do the "from globals import *" for each
url handler. Any ideas?

Cheers,
--
Soni Bergraj

[Jon Rosebaugh]

On 2/22/06, Soni Bergraj <ber...@aim.com> wrote:
> The drawback is that i have to do the "from globals import *" for each
> url handler. Any ideas?

First, you probably don't want to use globals for your module, because
that's the name of a built-in function.

That said, one idea that comes to mind is inheritance:

globvars = {'variable1':'value1', 'variable2':'value2'}

class useglobals:
def __init__(self):
for k, v in globvars.iteritems():
setattr(self, k, v)

class some_url_handler(useglobals):
def GET(self):
some_specific_variable = "some value"
web.render('some.templ')

[Jon Rosebaugh]

On 2/22/06, Jon Rosebaugh <cha...@gmail.com> wrote:
> That said, one idea that comes to mind is inheritance:

Actually, now that I think about it, that won't work properly, since
attributes aren't local variables. I'll reply with a working example
once I get one.

[Jon Rosebaugh]

Okay, I've got a working version, but it requires some editing of web.py.

First, you need to decide if you want the global variables to be in
their own namespace. That is, if you have a global variable named
'sitename', do you want to access it with $sitename or
$globvars.sitename in your template. I recommend using a separate
namespace, but that's up to you.

In request(), at or around line 1262, you'll see these lines:
elif terms is None:
terms = {'context': context}
terms.update(sys._getframe(1).f_locals)

Immediately below them add one of the following.
If you want the global variables to have their own namespace, add:
if hasattr(terms['self'], 'globvars'):
terms['globvars'] = terms['self'].globvars

If you want the global variables to be in the same namespace as the
local variables, add:
if hasattr(terms['self'], 'globvars'):
for k in terms['self'].globvars:
terms[k] = terms['self'].globvars[k]

Then, in your code, you'll need to do something like the following,
which is very similar to the previous code I posted:

globvars = web.Storage({'variable1':'value1', 'variable2':'value2'})

class useglobvars:
def __init__(self):
self.globvars = globvars

class some_url_handler(useglobvars):

def GET(self):
some_specific_variable = "some value"

web.render('temp.html')

I tested this and it does work, but maybe someone has an idea that
doesn't involve editing web.py.

[Aaron Swartz]

> class some_url_handler:
> def GET(self):
> from globals import *
> some_template_specific_variable = "some value"
> ...
>
> web.render('some.tmpl')

You should probably do something like:

web.render('some.tmpl', web.dictsum(locals(), globals()))

[Jon Rosebaugh]

On 2/22/06, Aaron Swartz <m...@aaronsw.com> wrote:
> web.render('some.tmpl', web.dictsum(locals(), globals()))

I, uh, can't find dictsum in the version of web.py on the site. (0.135)

[Aaron Swartz]

> I, uh, can't find dictsum in the version of web.py on the site. (0.135)

Oops, I meand dictadd.

[peter]

> I, uh, can't find dictsum in the version of web.py on the site. (0.135)

Sometimes it requires you to read the code & make a bit of a leap. Just
check the closest method names & read what the code is doing. The
function sigs are here <http://webpy.org/documentation> .